Elevation change of Lambert-Amery system from ICESat/GLAS data

The elevation change of Lambert-Amery Ice Shelf system in east Antarctic between 2003 and 2009 was investigated based on the data acquired by the Ice, Cloud, and land Elevation Satellite Geoscience Laser Altimeter System (GLAS) equipped on ICESat. The data are filtered using quality flags and other additional criteria. We have tested two methods to calculate the elevation change values, including linear interpolation crossover points and projection of near repeat track points, for the repeat track method, in order to reduce the influence of surface slope,we propose a correction based on Radarsat Antarctic Mapping Project Digital Elevation Model ,and then the data was divided into two categories according to whether the elevation is above or below 2000m, and 11 groups according to the distribution. In the subsequent time series analysis, autoregressive model was used to interpret the seasonal and inter-annual variations. The results showed that the elevation change rate was +0.014∼0.4m/year, which were generally consistent with the published results.